You may purchase one here from Caphalon company which is known for making some of the higher quality kitchenwares. http://www.Amazon.com/Kitchen-Essentials-Calphalon-Anodized-Nonstick/dp/B001DLO06U.
It depends on the wattage of the electric griddles and the capacity of the circuit. As a general guideline, a typical residential circuit can support 2-3 electric griddles of around 1500 watts each, but it's always best to check the circuit's capacity and the griddles' wattage to ensure safe usage.
Commercial griddles are designed for high volume applications. They will generally be bigger and will last longer than regular consumer griddles. They are made of higher quality materials and are also more expensive.
You can get cast iron griddles on Amazon and eBay. You can also buy cast iron griddles at stores like Walmart, Target, Williams-Sonoma, and Home Depot.
There are several companies that make stove top griddles including Lodge, Nordic Ware, Anolon, Chef's Design, Cephalon, Cuisenart and Emerilware. These griddles are availble from most online and offline stores.
Cast iron griddles are used for cooking, so the obvious places that they are used at are kitchens in restaurants, houses, apartments, and condominiums.
You can do comparison shopping of griddles at Nextag.com (http://www.nextag.com/stovetop-griddles/compare-html). Sears.com and JCPenney.com also carry them. If you are looking for an overall guide and reviews of stovetop griddles, Cook's Illustrated has a lot of information at: http://www.cooksillustrated.com/equipment/overview.asp?docid=14733
Andrew Gritzke goes by The Great One, and Griddles.
You can find commercial griddles at Standard Restaurant Supply in Salt Lake City, Utah. This store can be located at 3500 South West Temple, Salt Lake city, Utah.
A great resource for finding reviews on electric griddles is electric griddle reviews.net. This web site reviews some of the top brands in electric griddles and does a nice job of giving an overview of each one.
On most electric griddles you can cook just about anything for breakfast. Such as, eggs, pancakes, and bacon. Another benefit is electric griddles are alot healthier as they do not give off harmful chemicals and more fat escapes the food.
Double door is the best.
Some consider it to be a double planet or, more properly, a double dwarf planet. However it is currently not officially considered as such.